Question

Of the fifth grade students 15/20 went to the book fair.Of the students who went to the book fair,12/16 bought at least one book.What fraction of fifth grade students bought at least one book

Answer 1

`(9)/(16)`

Explanation:

Let total number of students
`=x`

Students went to the book fair:

Students went to book fair
`=(15)/(20)* total\ number\ of\ students=(15)/(20)x`

Students who bought book:

`Students\ who\ bought\ book=(12)/(16)* Number\ of\ students\ went\ to\ book\ fair=(12)/(16)* (15)/(20)x=(9)/(16)x`

Hence
`(9)/(16)` of total students bought at least one book.